*{
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}
ul,li{
	list-style: none;
}
img{
	vertical-align: middle;
}
a{
	text-decoration: none;
	color: black;
}
input{
	outline: none;
}
/*宽度自适应*/
html,body{
	height: 100%;
	background-color: #f7f8fa;
}